Yes. Bracha (which means blessing in Hebrew - ברכה) appears in the Jerusalem phone book about 40 times, as a surname.
Bracha (ברכה) means blessing.
בטח בה' ועשה טוב, שכון ארץ ורעה אמו×?×”(that's Tehillim 37:3).
There is no Hebrew word for valentine. If you're talking about a greeting card, you would call it a "kartis bracha" (כרטיס ברכה).
The surname "Howard" has no meaning in Hebrew. Only Hebrew surnames have meaning in Hebrew.
beit bracha shel hashem (בית ברכה של ה׳)
No, but it could be a Jewish surname.
No, but a Jewish person can have any surname.
Bracha Peli was born in 1892.
Bracha Peli died in 1986.
Bracha Lavee was born in 1948.
Bracha Turner was born in 1922.
Bracha Turner died in 2011.